CUMMINS 5291050 OEM ENGINE OIL PUMP – 5.9L/6.7L (2003–2018) | ISB/QSB

Genuine Cummins 5291050 OEM engine oil pump restores factory oil pressure, volume, and reliability in your 5.9L or 6.7L ISB platform. Whether you’re freshening up a high-mileage Ram or protecting a new long-block, this lubricating oil pump is the exact unit Cummins engineered for these engines—no guesswork, no off-brand compromises. CUMMINS 5291050 OEM ENGINE OIL PUMP 5.9L 6.7L ISB QSB genuine Cummins oil pump Ram 2500 Ram 3500 Ram 4500 Ram 5500 2003 2004 2005 2006 2007 2007.5 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 engine oil pump replacement Cummins 4897481 Cummins 4988801 Mopar 68489379AA CPP Diesel Cummins genuine parts

Key Features & Benefits

• Genuine Cummins 5291050 lubricating oil pump – not an aftermarket copy.
• Engineered to maintain proper oil pressure and flow on ISB/QSB 6.7 and late 5.9L ISB platforms.
• Direct bolt-in replacement for many 2003–2018 Ram 2500/3500 (and select 4500/5500) applications – verify by VIN/ESN.
• Correct gear profile and clearances for long bearing life and stable oil pressure under load.
• Ideal when rebuilding, replacing a failed pump, or correcting low oil pressure warnings.

Vehicle Fitment (Automotive)

Dodge Ram (verify by VIN before ordering):

• 2003–2007 Ram 2500/3500 – 5.9L Cummins ISB (24-valve common-rail)
• 2007.5–2018 Ram 2500/3500 – 6.7L Cummins ISB (24-valve common-rail)
• 2008–2018 Ram 4500/5500 – 6.7L Cummins ISB (verify by VIN/ESN for medium-duty chassis)

Industrial / Off-Highway (ISB/QSB):

• Selected ISB 6.7 and QSB 6.7 engines used in agricultural, construction, and industrial equipment.
• Cummins catalogs 5291050 as a lubricating oil pump for multiple EPA-era ISB/QSB applications – always confirm by engine serial number (ESN) before ordering.

Cross-Reference Part Numbers (Number Only – Order 5291050 to Stay Current)

Commonly referenced or superseded numbers (verify in your Cummins catalog or by ESN):

• Cummins: 4897481, 4988801, 3947308, 3957266, 3973398, 3971544, 4939588
• Mopar / OEM service: 68489379AA (Ram service listing for certain 6.7L applications)

Note: Use Cummins 5291050 as the current OEM ordering number when possible.

Recommended Cummins Companion Parts (CPP Diesel Links)

• Cummins 5289557 OEM Engine Oil Filter Housing (Oil Filter Head) – ISB 5.9L/6.7L – OE filter head the spin-on filter threads onto.
• Cummins 3975818 OEM Engine Oil Cooler – ISB 6.7L – factory oil cooler, ideal to replace if contamination or cooler failure occurred.
• Cummins 3977913 OEM Engine Oil Cooler Gasket Set – ISB 5.9L/6.7L – complete gasket set when resealing the cooler assembly.
• Cummins 5522189 OEM Engine Oil Pan Gasket – ISB 6.7L (2013–2025) – OE pan gasket for later 6.7L ISB applications.
• Cummins 4376091 OEM Lower Engine Gasket Kit – ISB 6.7L (2013–2018) – full lower gasket kit when doing an in-chassis or complete bottom-end refresh.

What’s In The Box

• (1) Genuine Cummins 5291050 lubricating engine oil pump
• Installation hardware & gaskets are typically reused or sourced separately (see recommended Cummins components above).

Install Notes

• Always verify part number and application by VIN (automotive) or ESN (industrial) before installation.
• Inspect the pickup tube, O-rings, and pan for damage or debris; clean or replace as needed.
• Prime the oil system per Cummins service procedures and monitor oil pressure on first startup.
• After any major oil-system service, change oil and filter again after the initial heat cycle if contamination was present.

FAQ

WILL THIS CUMMINS 5291050 OIL PUMP FIT MY 2003–2018 RAM?
In many cases yes—5291050 is an OEM oil pump used across 2003–2007 5.9L ISB and 2007.5–2018 6.7L ISB Ram applications. Because there are calibration and ESN-based variations, we strongly recommend confirming by VIN (truck) or ESN (engine tag) before ordering.

IS THIS A GENUINE CUMMINS PART OR AFTERMARKET?
This listing is for an authentic Cummins 5291050 OEM lubricating oil pump. You get OE casting quality, gear geometry, and clearances designed specifically for ISB/QSB 6.7 and related 5.9L ISB engines.

WHAT PART NUMBERS DOES 5291050 CROSS TO?
Common industry cross-references include Cummins 4897481, 4988801, 3947308, 3957266, 3973398, 3971544, 4939588 and Mopar 68489379AA. For best accuracy, use 5291050 as the primary Cummins part number and verify against your ESN.

WHEN SHOULD I REPLACE THE OIL PUMP?
Replace the pump if you have low oil pressure concerns verified with a mechanical gauge, during an engine rebuild, after bearing or rotating assembly failure, or when contamination (metal, debris) has circulated through the oil system.

WHAT OTHER PARTS SHOULD I REPLACE WHILE I’M THERE?
It’s smart to pair a new pump with a clean or new oil cooler, fresh cooler gaskets, a good oil filter head, and a new pan gasket. CPP Diesel stocks genuine Cummins components like 5289557 (filter housing), 3975818 (oil cooler), 3977913 (cooler gasket set), 5522189 and 4337615 (oil pan gaskets), plus 4376091 (lower gasket kit) for complete bottom-end refreshes.

DOES THIS PUMP CHANGE OIL PRESSURE COMPARED TO STOCK?
Being an OEM replacement, this pump is designed to restore factory-spec pressure and volume, not raise it beyond Cummins design targets. If your old pump or bearings were worn, you will typically see a more stable oil pressure trace with a fresh genuine pump and clean bearing clearances.

Specifications